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Press Release

ROFIN Profile Welding System

New Weld Sensor

ROFIN DC 050

ROFIN FL 020

11.04.2010
ROFIN at the TUBE 2010

Hamburg (RS), April 2010 – From 12 to 16 April, the international tube branch meets at the TUBE 2010 in Düsseldorf. The ROFIN Macro group presents laser based products and solutions for the processing of tubes and profiles. Visit us at Hall 6, booth A22.

Process safe laser welding of tubes and profiles with the new Weld Sensor

The ROFIN Macro group presents at the TUBE the Profile Welding System (“PWS”): A complete laser welding system with an integrated process sensor for tube and profile welding.

Laser welding of tubes and profiles provides very narrow seams with fine-grain structures and narrow heat effected zones. This means the heat treatment needed for further processing is often not required. In contrast to conventional TIG welding, non-contact laser welding can achieve significantly higher process speeds. The welded seams withstand even very high stress levels without tearing.

The Profile Welding System consists of a beam guidance and sensor system, with PC-controlled linear axis, which is needed for reliable laser welding. All the functions required to operate the laser system can be controlled using an integrated PLC controller. These functions include the introduction of process gases, the monitoring of the optical safety circuit, the complete system monitoring of the laser, and the associated cooling system. The moveable display unit attached to the support arm makes operation easy and clear.

Sensors for gap position recognition and seam tracking can detect even the slightest discrepancies in the seam position. This ensures that the laser beam always follows the seam, guaranteeing high process reliability. Thanks to high-speed precision linear drives, the PWS achieves position accuracies of a few µm at production speeds of up to 60 m/min.

For the first time, a new tracking sensor, the so-called Weld Sensor, will be presented at the TUBE 2010 show. The Weld Sensor allows the operator to “watch the weld” and is able to correct the position automatically. This new sensor system has been developed for CO2 and solid-state lasers.

Standardized interfaces and compact dimensions enable simple integration - even into existing systems. The tried and tested beam guidance system provides safe operation under industrial conditions. The PWS is virtually maintenance-free and is not sensitive to oil, dirt, dust, damp and electrical interference – the best prerequisites for use in tough industrial environments.

The system is modular, allowing adaptations to customer-specific requirements and local circumstances. This means, the beam guidance system can be adapted with a beam switch box or a beam splitter to enable simultaneous operation on various systems or at various welding points. Depending on the requirements, the PWS is fitted with optimized jet geometries in order to achieve the best possible application results. A special weld head allows drag welding, which optimizes the process for high welding speeds. Other features, such as documentation of process data for quality monitoring purposes, can also be integrated on an optional basis.

The perfect partners – ROFIN’s CO2 Slab Lasers

In order to capitalize on the full potential of the PWS, most of the lasers used are high-performance units with excellent beam quality.

The highly efficient CO2 Slab lasers out of ROFIN’s DC Series with up to 8 kW output power and an excellent beam quality of K = 0.95 are the first choice for highest welding speeds.

ROFIN´s low-maintenance CO2 Slab lasers are extremely service-friendly thanks to the trend-setting principle. The laser operates with only a few extremely durable components and does not need conventional gas recirculation – leading to a considerable reduction of maintenance and the gas consumption is also mini-mized. The laser beam that is produced in the resonator is uncoupled by a diamond window without any losses of power or beam quality. The internal water-cooled mirrors are robust and non-wearing reflective optics.

For applications that require larger weld seam widths, a modification of the beam characteristic with a so-called "DONUT"-Mode is available as an option.

The ideal addition – High brilliance Fiber Lasers of ROFIN’s FL Series

The highly-brilliant fiber lasers out of ROFIN’s FL Series are the ideal addition to the well proven Slab lasers. The fiber lasers are available with currently up to 2 kW output power and used for welding applications in material thicknesses from only a few µm up to 2 mm. In addition, composite tubes made of stainless steel or aluminum can be welded with highest speeds using the FL lasers.

The use of different fiber optics and focusing components allows the adaption of the focal geometry to the intended application. Especially in thin materials, very efficient processes can be seen using this high focusable lasers when improving existing machine and production concepts. The fiber lasers of the FL Series offer high efficiency, long inspection intervals and high welding speeds.

Contact:

ROFIN-SINAR Laser GmbH
PR & Marketing
Corinna Brettschneider
Berzeliusstraße 87
22113 Hamburg/Germany
Tel.: +49-40-73363-4380
email: C.Brettschneider(at)rofin-ham.de